Beating-engine roll.



10.796,8'24. I 'PATENTE' AUG. s, 1905.

' I. IP. DILLON.

BEATING ENGINE BULL.

APPLIOATION FILED AUG. 24,1903.

PATENT OFFICE.

IRWIN P. DILLON, OF LAWRENCE, MASSACHUSETTS.

BEATlNG-ENGINE ROLL.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed August 24, 1903. Serial No4, 170,533.

To (all 1071/077?, it ntay concern:

Be it known that I, IRWIN I. DILLoN, of Lawrence, State of Massachusetts, have invented an Improvement in Beating-Engine Rolls, of which the following description, in connection with the accompanying drawings, is a specication, like letters on the drawings representing like parts.

My invention aims to produce abeating-engine roll of great durability, safety, capacity, and ready adaptability to dierent grades of work.

In carrying out my invention instead of making the blades in the'form of bars or plates set on edge radially of the roll between the blocks I arrange them so as to provide an overlapping and interlocking construction, which gives mutual support and retains the blocks or wooden periphery of the roll against all possibility of becoming displaced or loosened, and I provide the blade with a plurality of cutting' edges, thereby bringing' into close relation a series of cutting edges when line work is required.

My invention also includes other important features, which will be more particularly pointed out in the course of the following description, reference being had to the accompanying drawings, inwhich I have shown a preferred embodiment of my invention.

In the drawings, Figure 1 is a central vertical sectional view of a roll constructed according to my invention. Fig. 2 is an enlarged cross-sectional view of a portion of the roll, showing further constructional details thereof. Fig. 3 is a perspective view of one of the knife-blades.

It will be understood that the general form of roll and other details of the engine may be of any kind desired, my invention relating to the construction, of the peripheral portion of the roll.

Beater-rolls of paper-refining engines are commonly constructed of a series oflongitudinal blocks and interposed knife-blades held together by hoops, the blades projecting beyond the wood sufficiently to cut and grind the pulp, and in preserving the same grinding functions I provide blades a, preferably having a single depending rib or body portion a, engaging shoulders or projecting portions c of the filling-blocks c or wooden periphery which constitute the pulp-carrying portion of the roll and retained on the spiders by hoops e e. At their outer portions the blades are provided with overhanging parts blade is T-shaped.

or shoulders a2 for resting upon and retaining the blocks c at their edges. There are two shoulders, as clearly shown in Fig. 2, so that in cross-section the body portion ofl each On this T-shaped body part I provide as many longitudinal cutting edges or knife-like flanges a3 as may be desired, according` to the lineness of the grinding which it is desired to accomplish. For coarse grinding one flange 0,3 will be sufiicient, and for ordinary fine work an alternate arrangement, such as is shown in the drawings, may be provided, one blade having two flanges and the next one three flanges, although the number of blades and arrangement thereof may be varied according' to the conditions of the work and judgment of the user. Also, preferably, instead of making the blocks solid throughout the entire peripheral thickness I arrange the wood in layers c2 c3 c", so that as the cutting-blades wear down one layer of wood after another may be cut away along` the dotted lines c5, Fig'. 2, thereby quickly and uniformly providing' pockets of' the required size between the successive blades. Ordinarily two layers, as indicated at the right, Fig. 2, will be sufficient; but three or more may be provided, if' desired.

The provisions of a single carrying-bar for a plurality of cutters or knives a3 enables me to maintain wide pockets for the pulp, which is very desirable for first-class work, and at the same time have the grinding edges of the blades close together, thereby insuring' the greatest eiiiciency. Also vthis arrangement reduces to a minimum the weight of the roll and the amount of metal thrown away when new blades are required, as there is only one body part a' for the entire group of cutters or knives instead of having a separate body part for each knife, as formerly. Besides the increased efficiency resulting from having' groups of blades with intervening wide pulppockets this construction is exceedingly strong, as it becomes impossible for the wood to fly out at high speed, as formerly, since it is held in positively and firmly by the interlocking construction, due to the overlapping shoulders, especially the shoulders o2 at the outer periphery of the layer of wood. This firm and perfect retention of the wood is maintained to the last, inasmuch as the cutting out of the layers c2 c3, &c., along the lines c5 does not disturb the solidity of the construction.

In building up the roll the spiders Z1 are assembled in usual manner, and the shaft Z and the blocks of wood are put in place, an intermediate hoop e being placed between the ends of the two rows of blocks, as indicated at the lower part of Fig. 1, andthen the blades a are driven into place, said blades being provided with recesses a" to enter over the hoop e and with retaining-notches al a to receive the hoops e e'.

Whilev I have herein described my invention in its preferred and most complete embodiment, I do not intend to restrict myself in all cases thereto, inasmuch as many variations in form, arrangement, and combination of parts may be resorted to without departing from the spirit and scope of my invention, and it will be noted that certain of the claims are limited to a part only oi' the features herein set forth, inasmuch as these features may be used to advantage with other constructions.

Having describedl my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a beating-engine roll, a grinding-blade having a cutting-flange, a depending rib for attachment to the roll, and shoulders on each side of the blade, the said shoulders and rib forming a T-shaped body portion.

2. Ina beating-engine roll, a grinding-blade having a plurality of cutting-ilanges, a depending rib for attachment to the roll, and shoulders on each side of the blade, the said shoulders and rib forming a T-shaped body portion.

3. Ina beating-engine roll, agrinding-blade formed with a plurality of cutting-Hanges and a single depending rib.

t. In a beating engine roll, a one piece grinding-blade formed with a plurality of cutting-lianges and a single depending rib.

5. A beating-engine roll having its periphery formed of wooden blocks and grindingblades arranged alternately, said blades comprising a cutting-flange, a depending rib and shoulders on each side of the blade, the blades being arranged with the shoulders overlapping the v adjacent blocks at each side, and means for securing' the ribs to the roll.

6. A beating-engine roll having its periphery formed of blocks and grinding-blades arranged alternately, said blocls being formed of separate concentrically-arranged layers of wood, said blades comprising a cutting-flange, a depending rib and shoulders on each side of the blade, the said shoulders overlapping the adjacent blocks at each side, and means for securing the ribs to the roll, whereby the parts are iirmly interloclied and h'eld in position and whereby as the blades wear down the pockets between the blades may be deepened by the removal of successive layersbetween the shoulders.

In testimony whereofI have signed my name to this specilication in the presence of two subscribing witnesses.

IRWIIN I). DILLON. Witnesses:

GEO. H. MAXWELL, WARREN D. OWEN. 

